125780666 has 8 divisors (see below), whose sum is σ = 205822944. Its totient is φ = 57173020.

The previous prime is 125780651. The next prime is 125780749. The reversal of 125780666 is 666087521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2858630 + ... + 2858673.

It is an arithmetic number, because the mean of its divisors is an integer number (25727868).

Almost surely, 2^125780666 is an apocalyptic number.

125780666 is a deficient number, since it is larger than the sum of its proper divisors (80042278).

125780666 is a wasteful number, since it uses less digits than its factorization.

125780666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5717316.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 125780666 is about 11215.1979920107. The cubic root of 125780666 is about 501.0387285915.

The spelling of 125780666 in words is "one hundred twenty-five million, seven hundred eighty thousand, six hundred sixty-six".